[kumarski]

Hydrogen buses limp at an EROI of 0.5 to 1.5.

Losses via Gibbs free energy (237 kJ/mol to split H2O) and compression (20% of H2’s 120 MJ/kg.)

Barely cash in on the H2-O2 reaction (ΔH = -285.8 kJ/mol).

Battery buses, powered by lithium-ion cells, hit EROI of 2 to 4.

Redox heavy lithium mining (150 MJ/kg) drags it all down.

Charge-discharge losses (90% Coulombic efficiency)+ 5-10% capacity fade after 1000 cycles.

All trails diesel’s 5-10 EROI and 46 MJ/kg density.

[f_devd]

By your own calculation EROI of Battery buses should be about 15-30 (taking diesel EROI as given as it has no source) if you actually apply the vehicle's efficiency; ~85% efficiency for E2E diesel-generator-to-EV. While diesel bus would be around ~21% effiency.

Source/explainer: https://youtu.be/6c94vRmbM6Y?si=WmCvyB6uKJT7TWZ7&t=444

[m101]

Is that hydrogen EROI number assuming lowest energy hydrogen? Or something like electrolysis?